Length Converter
Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards and miles.
Converting between metric and imperial length units — meters to feet, kilometers to miles, centimeters to inches — comes up constantly in travel, construction, and international shopping.
Common conversion factors worth memorizing
1 inch = 2.54cm exactly, 1 mile = 1.609km, and 1 meter ≈ 3.28 feet are the most useful approximate conversions for quick mental estimates.
Frequently asked questions
Why do US and UK sometimes differ slightly on imperial?
Historically some units were defined slightly differently — modern usage has mostly standardized.
Which system does most of the world use?
Metric is standard in the vast majority of countries — the US remains one of the few where imperial stays in everyday common use.